Montgomery County, Maryland rent increase calculator
Montgomery County became the first Maryland jurisdiction with permanent rent stabilization in 2023. For covered buildings, generally those older than 23 years, the annual increase is limited to the change in CPI-U plus 3%, never more than 6%. The county publishes the figure each spring for increases taking effect from 1 July; for 2026–2027 it is 5.2%.
Published figures
| Period | Allowable increase |
|---|---|
| Jul 2026 – Jun 2027 | 5.2% |
Source: Montgomery County Department of Housing and Community Affairs. Published in the county register each spring; effective 1 July.
Maximum new rent at common rents
Using the current 5.2% figure.
| Current rent | Maximum increase | Maximum new rent |
|---|---|---|
| $1,200.00 | $62.40 | $1,262.40 |
| $1,800.00 | $93.60 | $1,893.60 |
| $2,500.00 | $130.00 | $2,630.00 |
| $3,500.00 | $182.00 | $3,682.00 |
How the Montgomery County, Maryland cap works
Landlords must give 90 days’ written notice and may impose one increase per 12 months. Larger increases require a petition for fair return or capital improvements. Neighbouring Prince George’s County enacted a similar permanent cap in 2024.
Exemptions
- Buildings first occupied within the last 23 years.
- Owner-occupied small buildings, licensed care facilities, and income-restricted affordable units.
90 days’ written notice for any rent increase in Montgomery County.
Related Maryland rules
- Notice to end a month-to-month tenancy: Landlord: 60 days' written notice before the end of the rental period for month-to-month (90 days year-to-year; 7 days week-to-week with written lease, 21 without). Tenant: oral notice at least 30 days before expiration suffices, except in Baltimore City. Reduced 30-60 day periods apply in some foreclosure situations.
- Late fees: Late fee may not exceed 5% of the unpaid rent due for the rental period; for weekly tenancies, max $3 per week and $12 per month. No statutory grace period.
- Security deposit: 1 month's rent; returned Within 45 days after the end of the tenancy, with accrued interest, less lawful deductions; itemized list of damages and costs must be sent within the same 45 days..
Full page: Maryland landlord and tenant rules.
Frequently asked questions
What is the Montgomery County rent increase cap for 2026–2027?
5.2% for increases effective 1 July 2026 through 30 June 2027, under the CPI-U plus 3% formula with a 6% ceiling.
Which buildings are exempt?
Buildings first occupied within the last 23 years, owner-occupied small properties, licensed care facilities and income-restricted affordable units.